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WL BL. meaning on dwgs. 1

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EnginIT

EnginIT

Aerospace
Joined
Aug 1, 2009
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What is the meaning of WL.BL.TI in engineering drawing?
 
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WL = waterline = vertical coordinate
BL = body/buttock line = left/right coordinate (centerline = BL0)
TI = ?? = probably the axial coordinate
 
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EnginIT,

Is the engineering drawing for a titanium composite matrix? How is the term WL.BL.TI used? Is it in the footnotes or does it refer to a specific part in the assembly?

Thanks.
 
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I've always seen it as SWComposites posted, although for the axial I've come across FS (Fuselage station) or just STA (station) but haven't seen TI that I can remember.
 
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